Monthly demand at Phones Direct for the latest Samsung Galaxy phone are as shown. Estimate demand for the next two months using simple exponential smoothing with α = 0.2 and Holt’s model with α =

0.08 and β = 0.15 For the simple exponential smoothing model, use the level at Period 0 to be L = 2,066 (the average demand over the 12 months). For Holt’s model, use level at Period 0 to be L = 1.197 and the trend in Period 0 to be T = 134 (both are obtained through regression). Evaluate the MAD, MAPE, MSE, bias, and TS in each case. Which of the two methods do you prefer? Why?